I'm looking for a python equivalent of ruby's halcyon - a framework focused on "web service"-type applications rather than html-page-oriented ones. Google brings up a lot of example code and experiments, but I couldn't find anything that people were using in production and hammering on.
Failing that, what is the best web framework to use for this purpose? I'm looking for something small and lightweight, emphasising robustness and speed rather than features. Also, by speed I simply want a low latency overhead, not the ability to handle thousands of requests per second.